Mechanical property of Cu-base powder metallurgy friction material under impact load
Abstract：The dynamic and quasi-static stress-strain relationship of powder metallurgy(Cu-PM)had been studied experimentally.Dynamic tests were made at strain rate 102 s-1～103 s-1 by split Hopkinson pressure bar(SHPB),with bullet speeds of 4 m/s～15 m/s,and semiconductor gage was used on the transmitted bar.Quasi-static measurements were made at strain rate 10-4 s-1～10-3 s-1 by MTS machine.Reload tests were conducted at strain 0.005,0.010,0.020,0.035,respectively,to investigate the visco-elastic plastic characteristics.Analysis of dynamic and static test curve shows that the material exhibit strain under strain rate of 300 s-1 however,negative strain effect was observed under strain rate of 500 s-1.Therefore it is damage weakening non-linear glutinous elasto-plastic material.The condusion can be applied to sintered alloy.The dynamic and static data lay firm foundation on engineering design.
Keywords：powder metallurgyfriction materialstressstrainsplit Hopkinson pressure barsemiconductor gage
Publication Date：2004-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 14-17,26 )